Electrically-controlled device for use in shedding motion in looms for weaving figured fabrics and for use in figured-card-cutting machines



2 Sheets-Sheet l K. NAKANISHI Filed Nov. 5,v 1926 ummm,

ELECTRICALLY CONTROLLED DEVICE FOR USE IN SHEDDING MOTION IN LOOMS F'ORWEAVING -FIGURED FABRICS AND 'July 23, 1929.

July 23, 1929. K. NAKANIsl-u m5239737 ELECTRICALLY CONTROLLED DEVICE FORUSE IN 'SHEDDING MOTION IN LOOMS FOR WEAVING FIGURED FABRICS AND FOR USEIN FIGURED CARD CUTTING MACHINES Filed Nov. 5. 1926 2 Sheets-Sheet 2Patented .my 23, 1929.

UNITED STATES PATENT OFFICE.

KINJrno NAKANISHI, E EUxUoxA, JAPAN.

ELECTRICALLY-CONTROI'LED DEVICE FOR 'USE IN SHEDDING- MOTION IN LOOMSFOR WEAVING FIGURED FABRICS AND FOR USE IN FIGURED-CARD-CUTTINGMACHINES.

Application filed November 5, 1926. Serial No. 146,484.l

My invention relates to an electrically controlled device for sheddingmotion in looms for weaving iigured fabrics, and is also applicable tomachines for cutting figured cards used in jacquard and dobby machines.The invention comprises a pattern sheet or sheets having the conductingand insulating portions and rotated step-by-stcp, a contact brush orbrushes in contact with said pattern and adapted to be movedstep-by-step in the direction of the axis of rotation of said pattern, astationary insulating dischaving a plurality of annularly arrangedcontacts, a contact arm rotated in unison with the pattern and adaptedto engage successively with one of said contacts, and a plurality ofcircuits each including an electro-magnet and one of said contacts onthe insulating disc and connected in parallel with the source of currentThe object of my invention is to provide'an electrically controlledsystem for looms, which may be operated eiectvely in an economicalmanner.

The accompanying drawings illustrate my invention, in which:

Figure 1 is a diagrammatic view of the ap- -paratus according to myinvention applied to the loom for weaving figured fabrics, including theelectrical connection,

Figure 2 is a cross section of the pattern cylinder and the contactbrush cooperating therewith, a part being broken away,

Figure 3 is a detail showing the mechanism for moving the contact brushin the direction of the axis of the pattern cylinder,

Figure 4 is a detail elevation of the circuit closer comprising thefixed disc and the revoluble contact arm. My invention is applicable tothe shedding apparatus in looms for Weaving figured fabrics and to themachines for cutting cards used for jacquard and dobby machines. In

the folowing description, my invention will be described as applied tothe apparatus for overning the shedding motion in the looms or weavinggured fabrics.

The pattern or design sheet 3 comprises an electrically conductingportion 1 and an inl sulating portion 2, land it is formed into acylindrical sha e or an endless band. One,

two or more o such pattern sheets are employed, and same is rotatedstep-by-step by means of a4 suitable mechanism. AIn the example shown,two cylindrically formed pattern sheets are shown. Journalled in thebearings 4 is the main shaft 5 on which is mounted cylinders 6 and 6carrying the pattern sheets 3 and 3 respectively. On one end of the mainshaft 5 is mounted a gear 7 which is connected to a suitable mechanismand is rotated step-by-step thereby. The operation of said mechanism issuch that the gear 7 is stopped for a predetermined period during everyrotation. Extending from one side of each bearing 4 are arms 8 whichsupport a screw spindle 9. Contact brushes 10 an'd 10 are normally heldin contact with the patterns 3 and 3 respectively, and are-carried bythe holders 11 and 11 respectively- Said holders 11 and 11 are made ofinsulating material and are screwed on said screw spindle 9 to betraversed along the spindle upon the rotating movement of the latter. Atone end the screw spindle 9 is journalled in the frame 12', and'nearthat end a ratchet wheel 13 is securely mounted and an arm 14 is looselymounted to the screw spindle 9. (Fig. 3.) Mounted on the inner side ofthe frame 12 is a, check paWl 15 engaging with the teeth of the ratchetwheel 13. A pawl 16 for feeding the ratchet wheel 13 is mounted on thearm 14, and it is urged by a spring 17 also secured to the arm 14. Aspiral spring 18 is connected to the arm 14, and the latter is normallypulled by the spring 18 against the stop 19.

The main shaft 5 is also journalled at one end inl the frame 12, and twostuds 20 and 21 (Fig. 3) are arranged adjacent that end of the mainshaft. v On the main shaft 5 and the studs 20 and 21 are mounted gears22, 23, andl 24 respectively, transmitting the rotation from the mainshaft to the stud 21. 0n the inner end is secured a tappet 25 adapted toengage with and lift the arm 14 on every rotation of the stud. On theouter end are secured slip rings 28 and 28', the ring 28 having theconducting half 26 and the insulat- -ing half 27, and the ring 28 havingthe conducting half 26 and the insulating half 27 As shown in Figure 1,said conducting and insulating halves of the slip rings 28 and 28 vareoppositely arranged to each other. Contact brushes 30 .and 30 are heldin contact with the slip rings 28 and 28,', respectively, and they areconnected by means of conductors 29 and 29 to the contact brushes 10 and10 respectively.

On the left-hand-side bearing 4 is secured an insulatingv disc 32 havinga plurality of contacts 31 annularly arranged near the periphery of thedisc. The main shaft 5 loosely pass through the disc 32 and, at the end,carries la contact arm 33 securely mountedl thereon, which contact arm33 cooperates with the annularly arranged contacts 31.

The battery, generator, or other suitable source of current 34 isconnected, on one hand, with the slip rings 28 and 28 by means of theconductor 35 and, on the other hand, with the windings of the magnets37by means of the conductor 38 with one of the contacts 31 on theinsulating disc 32. Thus, it will be seen that when the contact brush 10engages with the conducting portion 1 of the pattern sheet, the magnet37 which is at the time connected with the contact 31 which is engagingat the time with the contact arm 33 will be energized, and then saidmagnet will pull the hook 39 ertaining thereto to bring the upper bentOP the latter out of the path of the knife 40, thereby preventing the engagement of the knife 40 with the hook 39. On the other hand, when thecontact brush 10 comes on the insulating portion 2 of the by the knife40 u pattern, the magnet 37 connected with that contact 31 which is atthe time cooperating with the contact arm 33 will bedeenergized, and itdoes not act upon the hook 39 pertaining thereto, and consequently thehookwill maintain its position adapted'to be -engaged n the risingmovement of the latter, there y making a shed of the figuring warppertaining thereto. The knives 40 are carried by the carrier box 41. Ahorizontal bar 43 carries a lurality of pushing projections 44, and is aapted to be moved end wise against the action of the spring 42, by theaction of a suitable device not shown, when the carrier box 41 descends,thus all the hooks 39 are pushed by the projections 44 into the paths ofthe-knives 40. When the box 41 ascends, the horizontal bar 42 willreturn to the normal position by the action of the spring 42, releasingthe hooks 39. Inthe drawin ,the-left hand one of the hooks 39 is shownas seized by the magnet 37.

The operation of the invention briefly is as follows The patterncarrying cylinder 6 is rotated step-by-step, and the Contact brush 10 isheld in contact with the pattern sheet having the conducting portion andthe insulating portion. The contact arm 33 also moves 1n unison with thecylinder 6 and engaging successively with a plurality of contacts 31 onthe insulating disc 32. The lstud 21 will be rotated for 180 during onerevolution of the main shaft 5. During one half rotation of the slipring 28, the contact brush 30 engages with the insulating half of thering 28. so that the circuit including this point will be opened, thusduring that period the system will not be influenced by the patternsheet 3 on the cylinder 6 During the same half rotation of the sliprings, the contact brush 30 engages with the conducting half of the slipring 28, supplying .current from the source 34 to the contact brush 10.When this brush 10 engages with the insulating portion of the pattern 3,the magnet 37 connected with at contact 31 which is cooperating at thetime with the contact arm 33 will not act upon the hook. On thecontrary, when said contact brush 10 engages with the conducting portion1, the magnet 37 connected with that contact 3l which is at the timecooperating with the arm 33 will be energized and pull the hook 39pertaining thereto, thus holding the latter in the position not to beengaged by the knife 40. From the foregoing, it will be observed thataccording tomy invention two contact brushes 30 and 30 alternatelyengages with the conducting half and the insulating half of the sliprings 28 and 28, and that the pattern sheets 3 and 3 alternate at theend of each half' revolution of the slip rings. So, my invention isapplicable to the system in which two differently colored figuring Warpsare used. As the stud 21 makes one revolution during two revolutions ofthe main shaft 5, the tappet 25 operates once during two revolutions ofthe pattern sheets 3 and 3, engaging with and lifting the arm 14 andstretching the spring 18. When the tappet is disengaged, the arm 14 isreturned to the normal position by the action of the spring 18, then thepawl 16 engaging with the teeth of the ratchet 13 will rotate thelatter, thereby rotating the screw spindle 9. Thereupon the holders 11and 11 will be moved one step in the axial direction along the patternsheets, thusthe engaging'- positions of the contact brushes 10 and 10 onthe pattern sheets 3 and 3 are varied.

Among many advantages, my invention possesses the advantages with theaforementioned arrangement that many numbers of magnets 37 may beeffectively and accurately operated employing a source of current of acomparatively low voltage, and that the elaborated figures or designsmay be readily transferred directly to the shedding system of the loomfor Weaving figured fabrics or to the card-cutting machines, in aneconomical manner.

What I claim is A machine of the class described comprising a cylinderhaving a shaft, bearings for said Shaft whereby said cylinder is mountedfor rotation, a pattern sheet on the cylinder having conducting andinsulating portions; a fixed .disc having contacts, a circuit closingarm revoluble with the cylinder and arranged to cooperate with saidcontacts; a threaded shaft arranged longitudinally of and parallel withthe cylinder, bearings for said threaded shaft, a ratchet wheel on saidthreaded shaft, i

closing means including an element movable W1th sald revoluble elementand a brush car- 10 -ried by said threaded' shaft and movable therebylongitudinally of the cylinder and on the pattern sheet thereof.

In testimony whereof I afx my signature.

KINJIRO NAKANISHI.

